From mboxrd@z Thu Jan  1 00:00:00 1970
From: Alan Schmitt <alan.schmitt@polytechnique.org>
Subject: Re: [PATCH] Improve configurability of ox-koma-letter
Date: Sun, 05 May 2013 19:06:20 +0200
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To: Viktor Rosenfeld <listuser36@gmail.com>
Cc: emacs-orgmode@gnu.org, Rasmus <rasmus@gmx.us>

Viktor Rosenfeld writes:

>> I have a question about this: is there some special magic that makes the
>> string "nil" to be parsed as `nil' and not as the string?
>
> I assume there must be. If I specify `foldmarks:nil' the if-statement in
> line 294 evaluates it as false:
>
> #+BEGIN_SRC emacs-lisp
> (format "\\KOMAoption{foldmarks}{%s}\n" (if with-foldmarks with-foldmarks "false"))
> #+END_SRC

OK.

>> About the subject, I had a quick look at the code and I find it
>> surprising: the default is "untitled", and I don't know how one can set
>> it to nil (unless there is some magic in plist-get that transforms the
>> "nil" string into nil).
>
> Same as above. `subject:nil' causes the code to skip the when-statement in line
> 301.
>
> #+BEGIN_SRC emacs-lisp
> (let ((with-subject (plist-get info :with-subject)))
>   (when with-subject
>     (concat
>      (format "\\KOMAoption{subject}{%s}\n" with-subject)
>      (format "\\setkomavar{subject}{%s}\n\n"
>              (org-export-data (plist-get info :title) info)))))
> #+END_SRC
>
> Note, that untitled prints the subject but without a prefix. Setting it to nil
> hides the subject altogether.

Thanks for the clarification.

I've applied the patch.

Best,

Alan